Stage-1 cationic C60 intercalated graphene oxide films. (30th April 2021)

• Record Type: Journal Article
• Authors: Chen, Xianjue; Ching, Karin; Rawal, Aditya; Lawes, Douglas J.; Tajik, Mohammad; Donald, William A.; Zhao, Chuan; Lee, Sun Hwa; Ruoff, Rodney S.
• Is Part Of: Carbon. Volume 175(2021)
• Page Start: 131
• Page End: 140
• Publication Date: 2021-04-30
• Subjects: Graphene oxide -- Fullerenes -- Intercalation -- Ion exchange -- Membrane permeation -- Graphitization; G-O graphene oxide -- C60(Py)n+ pyrrolidinium-functionalized C60 -- [C60(Py)n+]G-O film pyrrolidinium-functionalized C60 intercalated graphene oxide film -- GIC graphite intercalation compound -- MCE mixed cellulose ester; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.12.082
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: A "stage-1" intercalated film has been made by the ion exchange of pyrrolidinium-functionalized C60 (C60 (Py) n+ ) into centimeter-wide, micrometer-thick air-dried graphene oxide (G-O) films composed of tens of thousands of layers of stacked/overlapping G-O platelets, denoted [C60 (Py) n+ ]G-O films. Spontaneous intercalation by ion exchange of one layer of C60 (Py) n+ between adjacent G-O layers expands the interlayer spacing of the films from 0.74 nm to 1.46 nm. The films remain intact in water and various organic solvents, which is likely due to a strong affinity between C60 (Py) n+ and G-O. Membranes made of the films showed a 6.8 times faster water vapor permeation rate (allowing the vapor to transport through the membrane almost freely) and a 10.5 times faster liquid water permeation rate than G-O membranes. Heating the films at 2000 °C under applied pressure or at 2700 °C without physical confinement converted them into highly graphitized structures. Graphical abstract: Image 1 Highlights: A stage-1 intercalation of cationic C60 into graphene oxide films is reported. Intercalation driven by ion exchange expands the interlayer distance of the films. Intercalated films remain stable in water and various organic solvents. Water vapor transports through the intercalated films almost freely. Heating the film at 2700 °C converted it into highly graphitized structures.